20012221033223 has 4 divisors (see below), whose sum is σ = 20012238808128. Its totient is φ = 20012203258320.

The previous prime is 20012221033213. The next prime is 20012221033261. The reversal of 20012221033223 is 32233012221002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20012221033223 - 2⁸ = 20012221032967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012221033213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7075511 + ... + 9491432.

It is an arithmetic number, because the mean of its divisors is an integer number (5003059702032).

Almost surely, 2^{20012221033223} is an apocalyptic number.

20012221033223 is a deficient number, since it is larger than the sum of its proper divisors (17774905).

20012221033223 is a wasteful number, since it uses less digits than its factorization.

20012221033223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17774904.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 20012221033223 its reverse (32233012221002), we get a palindrome (52245233254225).

The spelling of 20012221033223 in words is "twenty trillion, twelve billion, two hundred twenty-one million, thirty-three thousand, two hundred twenty-three".